Essays about: "Single Photon Counting"

Showing result 1 - 5 of 17 essays containing the words Single Photon Counting.

1. 1. Multi-spectral X-ray imaging with a laser-plasma accelerator

   University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

   Author : Andrea Angella; [2022]
   Keywords : Multi-spectral imaging; single-photon counting; X-ray absorption spectroscopy; XAS; LWFA; laser-wakefield acceleration; K-edge; imaging; metal-detection algorithm; Physics and Astronomy;

   Abstract : This master thesis focuses on the creation of an algorithm to perform multispectral imaging of a metallic target using X-rays. The generation of an ultrashort high-power low-divergent X-ray beam is performed by means of a Ti:Sapphire laser driven wake-field plasma accelerator. READ MORE

3. 2. Deep Learning Semantic Segmentation of 3D Point Cloud Data from a Photon Counting LiDAR

   University essay from Linköpings universitet/Datorseende

   Author : Caspian Süsskind; [2022]
   Keywords : Deep Learning; Machine Learning; Computer vision; Semantic Segmentation; Photon Counting LiDAR; LiDAR; Point Cloud; 3D Data; Point Cloud Segmentation; Point Classification; Convolutional Neural Network; CNN; SPVCNN; Djupinlärning; LiDAR; fotonräknande LiDAR; semantisk segmentering; datorseende; punktmoln; maskininlärning;

   Abstract : Deep learning has shown to be successful on the task of semantic segmentation of three-dimensional (3D) point clouds, which has many interesting use cases in areas such as autonomous driving and defense applications. A common type of sensor used for collecting 3D point cloud data is Light Detection and Ranging (LiDAR) sensors. READ MORE

4. 3. Neural Networks for Material Decomposition in Photon-Counting Spectral CT

   University essay from KTH/Medicinteknik och hälsosystem

   Author : Hugo Charrier; [2022]
   Keywords : PCCT; X-ray; scanner; photon counting; AI; neural networks;

   Abstract : Photon counting computed tomography scanners constitute a major improvement of the field of computed tomography, opening various prospective and enabling the decomposition of computed tomography images into different materials. The material decomposition algorithm, mapping photon counts to material pathlengths, relies on a forward model with Poisson statistics. READ MORE

5. 4. Optical characterisation of AAO/CsPbBr3 perovskite nanocomposites

   University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

   Author : Klára Nováková; [2021]
   Keywords : perovskite; scintillator; optoelectronics; semiconductor; X-ray detection; Physics and Astronomy;

   Abstract : Direct bandgap metal lead halide perovskites offer promising optoelectronic properties desirable in a wide range of applications including photodetection. However, the incomplete and poor understanding of the photophysical processes taking place in these materials, along with their poor stability, is the bottleneck for optimisation and further development of metal halide perovskite devices. READ MORE

6. 5. Segmentation of People and Vehicles in Dense Voxel Grids from Photon Counting LiDAR using 3D-Unet

   University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

   Author : Fredrik Danielsson; [2021]
   Keywords : Deep Learning; LiDAR; Segmentation; Dense Voxel Grids; Single Photon Counting; Machine Learning; 3D U-Net; Convolutional Neural Network;

   Abstract : In recent years, the usage of 3D deep learning techniques has seen a surge,mainly driven by advancements in autonomous driving and medical applications.This thesis investigates the applicability of existing state-of-the-art 3Ddeep learning network architectures to dense voxel grids from single photoncounting 3D LiDAR. READ MORE